My period changes as well. It has changed quite a bit over the years. I'm 30 years old and, my period lasts 5-6 days. I would have normal bleeding the first day. Heavy, heavy flow on the 2nd and 3rd. And, the 4th and 5th day would be very light. Now however, the cramps begin very lightly about a week before my period starts. They're off and on. But, then the cramps come back full force about an hour before I start to bleed. It starts off normal but, by the third day, I'm just spotting or bleeding lightly. To me, that's strange because my period always went one way. Many things can change the flow of your period. Hormones and stress are a couple. It could be nothing at all wrong but, if you are worried, visit your doctor and try to get to the source of the problem, if there is one. Keep us posted and good luck!!
how old are u coz if u are over 50 it may be normal.